:root {
  --color-ink: #1a2820;
  --color-forest: #2d4a3e;
  --color-moss: #3d6b54;
  --color-gold: #c9a962;
  --color-gold-soft: #e8dcc4;
  --color-cream: #f7f4ec;
  --color-paper: #fefdfb;
  --color-muted: #5c6b61;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --shadow-soft: 0 20px 50px rgba(26, 40, 32, 0.12);
  --radius: 12px;
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-paper);
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
  display: block;
}

a {
  color: var(--color-moss);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(254, 253, 251, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(45, 74, 62, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
}

.logo {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-ink);
  letter-spacing: 0.06em;
}

.logo span {
  color: var(--color-moss);
  font-weight: 600;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.main-nav a {
  color: var(--color-ink);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
}

.main-nav a:hover {
  color: var(--color-moss);
}

.main-nav .nav-cta {
  padding: 0.5rem 1.1rem;
  background: var(--color-forest);
  color: var(--color-cream) !important;
  border-radius: 999px;
  text-decoration: none;
}

.main-nav .nav-cta:hover {
  background: var(--color-moss);
  color: var(--color-paper) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
}

.hero {
  position: relative;
  min-height: min(88vh, 720px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    rgb(26, 40, 32)
    url("https://images.unsplash.com/photo-1559056199-641a0ac8b55e?auto=format&fit=crop&w=2400&q=80")
    center / cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(26, 40, 32, 0.88) 0%,
    rgba(26, 40, 32, 0.55) 45%,
    rgba(26, 40, 32, 0.35) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-block: 4rem;
  max-width: 36rem;
}

.hero-tag {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: 500;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.2;
  color: var(--color-cream);
}

.hero-desc {
  margin: 0 0 2rem;
  color: rgba(247, 244, 236, 0.88);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-ink);
  border-color: var(--color-gold);
}

.btn-primary:hover {
  background: var(--color-gold-soft);
  border-color: var(--color-gold-soft);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--color-cream);
  border-color: rgba(247, 244, 236, 0.55);
}

.btn-outline:hover {
  background: rgba(247, 244, 236, 0.12);
  text-decoration: none;
}

.btn-block {
  width: 100%;
}

.section {
  padding-block: clamp(3.5rem, 8vw, 5.5rem);
}

.section-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 3.5vw, 2.1rem);
  font-weight: 700;
  color: var(--color-forest);
}

.section-head {
  text-align: center;
  max-width: 36rem;
  margin-inline: auto;
  margin-bottom: 2.75rem;
}

.section-sub {
  margin: 0;
  color: var(--color-muted);
  font-size: 1.02rem;
}

.lead {
  font-size: 1.08rem;
  color: var(--color-ink);
}

.grid-2 {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 880px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }
}

.section-about {
  background: linear-gradient(180deg, var(--color-paper) 0%, var(--color-cream) 100%);
}

.about-text p {
  margin: 0 0 1rem;
  color: var(--color-muted);
}

.check-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.65rem;
  color: var(--color-ink);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-gold);
}

.about-media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.about-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.section-products {
  background: var(--color-paper);
}

.product-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 720px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  background: var(--color-paper);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(45, 74, 62, 0.1);
  box-shadow: 0 8px 30px rgba(26, 40, 32, 0.06);
  transition: transform 0.25s, box-shadow 0.25s;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.product-media {
  overflow: hidden;
}

.product-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.4s;
}

.product-card:hover .product-media img {
  transform: scale(1.04);
}

.product-card h3 {
  margin: 1rem 1.25rem 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
}

.product-card p {
  margin: 0 1.25rem 1.25rem;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.section-process {
  background: var(--color-cream);
}

.process-steps {
  list-style: none;
  margin: 0 0 2.5rem;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .process-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

.process-steps li {
  background: var(--color-paper);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid rgba(45, 74, 62, 0.08);
}

.step-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.process-steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.process-steps p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.process-banner {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.process-banner img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
}

.section-cases {
  background: var(--color-paper);
}

.cases-mosaic {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 800px) {
  .cases-mosaic {
    grid-template-columns: 1.2fr 1fr;
    grid-template-rows: auto auto;
  }

  .case-large {
    grid-row: span 2;
  }
}

.case-item {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(26, 40, 32, 0.1);
}

.case-item img {
  width: 100%;
  height: 100%;
  min-height: 200px;
  object-fit: cover;
}

.case-large img {
  min-height: 100%;
}

.section-contact {
  background: linear-gradient(180deg, var(--color-cream) 0%, var(--color-paper) 100%);
}

.contact-grid .lead {
  margin-top: 0.5rem;
  color: var(--color-muted);
}

.contact-info {
  margin-top: 2rem;
  font-style: normal;
  font-size: 0.98rem;
  line-height: 1.8;
}

.contact-info strong {
  color: var(--color-forest);
  margin-right: 0.35rem;
}

.contact-form {
  background: var(--color-paper);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid rgba(45, 74, 62, 0.1);
  box-shadow: var(--shadow-soft);
}

.contact-form label {
  display: block;
  margin-bottom: 1.1rem;
}

.contact-form label span {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-forest);
  margin-bottom: 0.35rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1px solid rgba(45, 74, 62, 0.2);
  border-radius: 8px;
  background: var(--color-cream);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--color-moss);
  outline-offset: 2px;
  border-color: var(--color-moss);
}

.form-note {
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.site-footer {
  padding: 2rem 0;
  background: var(--color-forest);
  color: rgba(247, 244, 236, 0.85);
}

.footer-inner {
  text-align: center;
}

.footer-brand {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
}

.footer-beian {
  margin: 0.5rem 0 0;
  font-size: 0.82rem;
  opacity: 0.9;
  line-height: 1.6;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.15rem 0.35rem;
}

.footer-beian-label {
  color: rgba(247, 244, 236, 0.88);
}

.footer-beian-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: rgba(247, 244, 236, 0.9);
  text-decoration: none;
}

.footer-beian-link:hover .footer-beian-num {
  color: var(--color-gold-soft);
  border-bottom-color: var(--color-gold-soft);
}

.footer-beian-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  object-fit: contain;
  vertical-align: middle;
}

.footer-beian-num {
  border-bottom: 1px solid rgba(247, 244, 236, 0.35);
}

.footer-meta {
  margin: 0;
  font-size: 0.82rem;
  opacity: 0.85;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-paper);
    flex-direction: column;
    padding: 1.25rem;
    gap: 0;
    border-bottom: 1px solid rgba(45, 74, 62, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(45, 74, 62, 0.06);
    width: 100%;
    text-align: center;
  }

  .main-nav .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }
}